1-1/2" X 7 FINE WASHER HEAD SCREWS X 500

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A FINE-THREAD screw is used any time you’re driving the screw into a hardwood (i.e., oak, maple, walnut, cherry, hickory, etc.) The COARSE-THREAD screw has a larger thread diameter and provides greater holding power when driving a screw into soft material such as plywood, particle board, MDF, melamine, and pine. We also offer a HI-LO THREAD type which consists of two separate threads, one higher than the other that serves as a general purpose screw in medium hardwoods like poplar